Siren-whistle.



G. F. CONNER SIREN WHISTLE.

APPLICATION mtu Amir. 19H.

Patented Aplf; 11, 1916.

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y GEORGE F. CONNER, OF PORT HUROYNVy MICHIGAN.

SIREN-WHISTLE.

Specification of Letters Patent.

Patented Apr. 11, 1916.

Application filed April 17, 1911. Serial No. 621,475.

To all whom it may concern.'

Be it known that I, GEORGE F. CONNER, a citizen of the United States, residing in the city of Port Huron, in the county of St. Clair and State of Michigan, have invented a new and useful Siren- Whistle, of which the following is a specification.

My invention relates to improvements in siren whistles; and the objects of my improvement are, first, to provide a whistle of this class Whichwill automatically regulate the pitch of the sound emitted under high pressure of steam; second, to secure a construction whereby the lever controlling the inlet valve may be inserted above the cylinder; and third, to attach the controlling lever by means of projections and notches in its inserted end. I attain these objects by the mechanism illustrated in the accompanying drawing, in Which- Figure 1 is a vertical section of the whistle; Fig. 2 a cross section of same on line Z-Z of Fig. 1 and Fig. 3, a detailed view in perspective of the cylinder.

Similar letters refer to similar parts throughout the several views.

A is a tube the lower portion of which is octagonal and for the purpose of description will be called the nut; the upper portion is cylindrical and will be called the body.

The lower portion of the nut is interiorly screw threaded for attachment to a steam pipe.` The upper portionis bowled sufliciently to permit of the lowering of the inlet valve B and the flowing of the steam through the upper portion of the valve into the annular chamber E, the lower end of which chamber the valve B is adapted to close.

The valve stem B passes through a een;

tral passage F, the circular wall of which at its upper terminus F', which is located in the lower portion of the body, forms a support for the spring G which holds the valve B in position by pressing upwardly against the washer H securely held upon the valve stem B by the pin I.

The casing J is provided with openings J formed at an angle to the radii of said casing. The openings K which are located in the cylinder K are also set at an angle to the radii of the cylinder and at an angle opposite to the angle of the openings in the casing J and this formation is such that the steam, in flowing from the annular chamber E through the openings J will cause the cylinder K to rotate very rapidly, thereby alternately opening and closing the passages formed by the openings J and K and setting up sound waves. In order to prevent the cylinder K from revolving too rapidly, resulting in a sound too shrill to be pleasing to the ear, one end of the cylinder K is slotted into two or more sections so that the centrifugal force of the revolving cylinder will cause that end to expand and the speed will then be held in check by the frictional contact of the cylinder K with the casing J. By proportioning the length and weight of the slotted portions, the speed of the cylinder can be controlled as desired.

L indicates the horn or bell of the whistle which is screwed on to the casing J by a screw thread at J. In the lower part of the bell and extending down into its threaded portion to secure sufficient space for insertion is the opening L through which passes the controlling lever M which is fulcrumed on the rim of the bell and held in place by the projections N, N' and N and the notches O and O when the horn and body are screwed home and the lever engaged with the valve stem B', which it is adapted to operate.

By this construction the manufacturing cost is reduced and the whistle is more effective, in that there is no opening for the escape of steam between the thread nut and the sound producing body; and the lever is held more securely than by pin fastenings.

By operating the lever M the inlet valve B is forced away from its seat and the steam flows through into the annular chamber E, then through the openings J and K to the horn and thence to the atmosphere. Upon the releasing of the lever M, the spring G will immediately and automatically close the inlet valve.

I claim:

1. In a siren, the combination of a body and controlling valve regulating the How of steam thereto, a l'evoluble cylinder in the body, the cylinder having openings at an angle to the radii thereof, one or more of the openings extending to one end of the cylinder.

2. In a siren, the combination of a slotted body, a valve adapted to control the supply of steam thereto, and an expandible slotted cylinder in the body.

3. A siren comprising a tube having a valve controlled passage and an annular chamber, the innerl casing of which is circular and provided with openings set at an angle to the radii of said casing; a hollow open ended cylinder, one end of which is slotted into sections to fit Within said chamber, having openings in the side Wall co1'- responding to the openings in the casing and inclined at an angle opposite to' the angle' of the openings in said casing, a valve hav- 10 ing a valve stem extending upward through the tube, and a controlling lever engaged with the valve stem above the cylinder adapted to operate the valve.`

4. In a siren, a body having a slotted casing and a revoluble, expandible slotted cylinder secured therein.

GEORGE F. CONNER. Witnesses:

ROBERT M. SOUTAR, GILLm'rE WASTELL. 

